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Journal articles on the topic 'Effective heat capacity method'

Author: Grafiati

Published: 4 June 2021

Last updated: 7 February 2022

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1

Amin, M. Ruhul. "Thermal Analysis During Continuous Casting Process Using Effective Heat Capacity Method." Journal of Thermophysics and Heat Transfer 14, no. 2 (2000): 170–76. http://dx.doi.org/10.2514/2.6528.

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2

Basak, Tanmay, and K. G. Ayappa. "Analysis of microwave thawing of slabs with effective heat capacity method." AIChE Journal 43, no. 7 (1997): 1662–74. http://dx.doi.org/10.1002/aic.690430703.

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3

Hu, Tao, Yan Li, Duo Su, and Hai Xia Lv. "Thermal Modeling Solid-Liquid Phase Change Materials (PCMs)." Advanced Materials Research 746 (August 2013): 161–66. http://dx.doi.org/10.4028/www.scientific.net/amr.746.161.

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Three thermal modeling methods for phase change materials (PCMs): enthalpy-based method, effective heat capacity method and apparent heat capacity method, are presented in details. Their characteristics and application limitations are compared and discussed. We found that enthalpy-based method and effective heat capacity method are both approximation treatments, and can be well used in steady state problems, while apparent heat capacity method tracks the moving phase change boundary in PCMs, and it is the most accurate and applicable method of the three for dealing with transient processes. Th

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4

Kobasko, Nikolai. "STUDY OF DIFFERENCES BETWEEN REAL AND EFFECTIVE HEAT TRANSFER COEFFICIENTS TO PROVIDE CORRECT DATA ON TEMPERATURE FIELD CALCULATIONS AND COMPUTER SIMULATIONS DURING HARDENING OF STEEL." EUREKA: Physics and Engineering 3 (May 31, 2018): 42–51. http://dx.doi.org/10.21303/2461-4262.2018.00646.

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The paper analyses contemporary methods and probes for testing liquid media used as a quenchant in heat treating industry. It is shown that lumped-heat-capacity method, often used for testing liquid media, produces big errors during transient nucleate boiling processes due to incorrect calculation condition caused by use effective heat transfer coefficient (HTC). The effective heat transfer coefficients (HTCs), utilized for this purpose, are almost seven times less as compared with real HTCs that results in incorrect calculation the value of Bi. Instead of lumped-heat -capacity method, a gener

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5

KAGA, Kunihiko, Kenichi YAMADA, Satoru KOTOH, and Teturo OGUSHI. "Predictioll of Capacity of a Heat Exchanger by Thermal Network Method. The Prediction of Capacity of a Condenser with Effective Specific Heat Model." Transactions of the Japan Society of Mechanical Engineers Series B 66, no. 647 (2000): 1826–32. http://dx.doi.org/10.1299/kikaib.66.647_1826.

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6

He, Yiqian, Xingcong Dong, and Haitian Yang. "A new adaptive algorithm for phase change heat transfer problems based on quadtree SBFEM and smoothed effective heat capacity method." Numerical Heat Transfer, Part B: Fundamentals 75, no. 2 (2019): 111–26. http://dx.doi.org/10.1080/10407790.2019.1607116.

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7

Li, Weijie, Haiming Huang, Hailing Yu, and Xiaoliang Xu. "Effects of gradient density on effective heat capacity of charring ablative material for re-entry vehicles." International Journal of Numerical Methods for Heat & Fluid Flow 25, no. 3 (2015): 472–83. http://dx.doi.org/10.1108/hff-12-2013-0349.

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Purpose – The effective heat capacity is a key index to estimate the thermal protection performance of charring ablative materials in reentry vehicles subjected to aerodynamic heat loads. The purpose of this paper is to investigate the effects of gradient density on the effective heat capacity. Design/methodology/approach – Based on the Fourier law and the pyrolysis interface model, the authors establish the governing equations for the transient heat conduction with variable density, and then simulate one-dimensional transient thermal behavior of a homogeneous and three types of non-homogeneou

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8

Zhang, Y., K. Du, J. P. He, L. Yang, and Y. J. Li. "Impact Factors Analysis of the Enthalpy Method and the Effective Heat Capacity Method on the Transient Nonlinear Heat Transfer in Phase Change Materials (PCMs)." Numerical Heat Transfer, Part A: Applications 65, no. 1 (2013): 66–83. http://dx.doi.org/10.1080/10407782.2013.811153.

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9

Dong, Cun Li, Jin Sheng Liang, Gang Xue, and Yan Qing Wang. "Evaluation of Energy Efficiency of Heat Emission Coating." Advanced Materials Research 96 (January 2010): 261–65. http://dx.doi.org/10.4028/www.scientific.net/amr.96.261.

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Experimental device and principle were proposed with the aim of giving a method to evaluate energy efficiency of heat emission coating in this paper. The formula for calculating energy saving efficiency of heat emission coating was given based on heat dissipating capacity obtained. The results showed that the method was effective for evaluation of energy efficiency of heat emission coating with an error of 0.32%.

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10

Yang, Haitian, and Yiqian He. "Solving heat transfer problems with phase change via smoothed effective heat capacity and element-free Galerkin methods." International Communications in Heat and Mass Transfer 37, no. 4 (2010): 385–92. http://dx.doi.org/10.1016/j.icheatmasstransfer.2009.12.002.

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11

Yao, Wei-An, Hong-Xiao Yao, Chong Zuo, and Xiao-Fei Hu. "Precise integration boundary element method for solving dual phase change problems based on the effective heat capacity model." Engineering Analysis with Boundary Elements 108 (November 2019): 411–21. http://dx.doi.org/10.1016/j.enganabound.2019.08.027.

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12

Thalfeldt, Martin, Anders Skare, Laurent Georges, and Øyvind Skreiberg. "A Simplified Power Sizing Method for the Correct Building Integration of Wood Stoves." E3S Web of Conferences 111 (2019): 02066. http://dx.doi.org/10.1051/e3sconf/201911102066.

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Wood stoves are widely used in dwellings for space heating, however transient heat output and relatively large heat emission might cause problems with over-heating in new well-insulated buildings. This paper introduces a simplified power sizing method for the building integration of wood stoves which was compared to dynamic building performance simulations. The analysis showed that on average the simplified method predicted the temperature increase in the living room similarly to dynamic simulations. However, in some cases the difference was up to 60%, which is significant when carried forward

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13

Gong, Zhen‐Xiang, and Arun S. Mujumdar. "Non‐convergence versus non‐conservation in effective heat capacity methods for phase change problems." International Journal of Numerical Methods for Heat & Fluid Flow 7, no. 6 (1997): 565–79. http://dx.doi.org/10.1108/09615539710170754.

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14

Blumberga, Dagnija, Vivita Priedniece, Rūdolfs Rumba, et al. "Mathematical Modeling of Heat and Mass Processes in a Scrubber: The Box–Wilson Optimization Method." Energies 13, no. 9 (2020): 2170. http://dx.doi.org/10.3390/en13092170.

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Optimal performance parameters must be found in order to organize efficient heat and mass transfer and effective flue gas cooling using a wet scrubber. Mathematical models are widely used for system optimization. However, a significant number of the available models have application limitations. This study presents a universal model for heat and mass transfer simulation in a scrubber called a fog unit, which has been developed and validated. Validation was performed by comparing the experimental and calculated results. Good agreement was achieved among the data, with differences between result

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15

Sapińska-Śliwa, Aneta, Tomasz Sliwa, Kazimierz Twardowski, Krzysztof Szymski, Andrzej Gonet, and Paweł Żuk. "Method of Averaging the Effective Thermal Conductivity Based on Thermal Response Tests of Borehole Heat Exchangers." Energies 13, no. 14 (2020): 3737. http://dx.doi.org/10.3390/en13143737.

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This work concerns borehole heat exchangers and their testing using apparatus for thermal response tests. In the theoretical part of the article, an equation was derived from the known equation of heat flow, on which the interpretation of the thermal response test was based. The practical part presents the results of several measurements taken in the AGH Laboratory of Geoenergetics. They were aimed at examining the potential heat exchange capacity between the heat carrier and rock mass. Measurement results in the form of graphs are shown in relation to the examined, briefly described wells. Re

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16

Shim, Joong Pyo, Hong Ki Lee, and Byung Ho Song. "Electrochemical Comparison of Chemically or Physically Modified Natural Graphite Anode for Lithium-Ion Batteries." Solid State Phenomena 124-126 (June 2007): 995–98. http://dx.doi.org/10.4028/www.scientific.net/ssp.124-126.995.

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Natural graphite anodes were treated by different methods to improve their cyclability. We tried following methods; heat-treatment at 550oC for graphite powder, addition of carbon black for electrode and VC (vinylene carbonate) in electrolyte. All methods decreased capacity fade rate during constant cycling. The addition of carbon black decreased capacity fade significantly but increased irreversible capacity much at first cycle. Heat-treatment and VC were also effective for cycling and irreversible capacity loss.

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17

Poirier, D., and M. Salcudean. "On Numerical Methods Used in Mathematical Modeling of Phase Change in Liquid Metals." Journal of Heat Transfer 110, no. 3 (1988): 562–70. http://dx.doi.org/10.1115/1.3250529.

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The work presents an analysis and comparative evaluation of different methods used for the numerical solution of heat conduction with phase change problems. Both freezing (melting) water as well as solidifying liquid metal problems are examined. Emphasis is placed on weak formulations as they tend to be simple to program and easily implemented in existing single-phase codes. A new method based on the apparent capacity technique is proposed. In this technique an “effective capacity” is computed, based on the integration of temperature profiles over the nodal volumes. This method shows significa

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18

Roetzel, Wilfried, and Chakkrit Na Ranong. "Evaluation method of single blow experiment for the determination of heat transfer coefficient and dispersive Peclet number." Archives of Thermodynamics 36, no. 4 (2015): 3–24. http://dx.doi.org/10.1515/aoter-2015-0029.

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Abstract An evaluation method is developed for single blow experiments with liquids on heat exchangers. The method is based on the unity Mach number dispersion model. The evaluation of one experiment yields merely one equation for the two unknowns, the number of transfer units and the dispersive Peclet number. Calculations on an example confirm that one single blow test alone cannot provide reliable values of the unknowns. A second test with a liquid of differing heat capacity is required, or a tracer experiment for the measurement of the Peclet number. A modified method is developed for gases

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19

MAĆKOWIAK, JAN, and DAWID BORYCKI. "DRESSED BOSONS AND EFFECTIVE TEMPERATURE — A FORMALISM FOR HELIUM II." International Journal of Modern Physics B 26, no. 20 (2012): 1250119. http://dx.doi.org/10.1142/s0217979212501196.

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The thermodynamics of a free Bose gas with effective temperature scale [Formula: see text] and hard-sphere Bose gas with the [Formula: see text] scale are studied. [Formula: see text] arises as the temperature experienced by a single particle in a quantum gas with 2-body harmonic oscillator interaction V osc , which at low temperatures is expected to simulate, almost correctly, the attractive part of the interatomic potential V He between 4 He atoms. The repulsive part of V He is simulated by a hard-sphere (HS) potential. The thermodynamics of this system of HS bosons, with the [Formula: see t

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20

Li, Dan, Weilin Liao, Angela J. Rigden, et al. "Urban heat island: Aerodynamics or imperviousness?" Science Advances 5, no. 4 (2019): eaau4299. http://dx.doi.org/10.1126/sciadv.aau4299.

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More than half of the world’s population now live in cities, which are known to be heat islands. While daytime urban heat islands (UHIs) are traditionally thought to be the consequence of less evaporative cooling in cities, recent work sparks new debate, showing that geographic variations of daytime UHI intensity were largely explained by variations in the efficiency with which urban and rural areas convect heat from the land surface to the lower atmosphere. Here, we reconcile this debate by demonstrating that the difference between the recent finding and the traditional paradigm can be explai

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21

Zhang, Yuan. "Modified computational methods using effective heat capacity model for the thermal evaluation of PCM outfitted walls." International Communications in Heat and Mass Transfer 108 (November 2019): 104278. http://dx.doi.org/10.1016/j.icheatmasstransfer.2019.104278.

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22

Pilinevich, L. P., M. V. Tumilovich, A. G. Kravtsov, D. M. Rumiantsav, and K. V. Hryb. "Research of the process of obtaining capillary-porous materials from metal powders for heat pipes." Doklady BGUIR 19, no. 4 (2021): 5–12. http://dx.doi.org/10.35596/1729-7648-2021-19-4-5-12.

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Heat pipes are designed to effective removing heat from heating elements and reducing the temperature of various devices. Heat pipes with capillary porous structures are designed to operate under conditions of unfavorable gravity forces. Their main advantages are their high heat transfer capacity, as well as the ability to retain the coolant in a capillary-porous structure under dynamic power loads. The purpose of this work is to study the process of obtaining capillary-porous materials from metal powders for heat pipes with increased efficiency of using the vibration molding method. The artic

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23

Sun, Dechuan, Tianyou Luo, and Qiang Feng. "New Contour Design Method for Rocket Nozzle of Large Area Ratio." International Journal of Aerospace Engineering 2019 (December 20, 2019): 1–8. http://dx.doi.org/10.1155/2019/4926413.

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A rocket engine for space propulsion usually has a nozzle of a large exit area ratio. The nozzle efficiency is greatly affected by the nozzle contour. This paper analysed the effect of the constant capacity ratio in Rao’s method through the design process of an apogee engine. The calculation results show that increasing the heat capacity ratio can produce an expansion contour of smaller expansion angle and exit area ratio. A simple modification of Rao’s method based on thermally perfect gas assumption was made and verified to be more effective. The expansion contour designed by this method has

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24

Choe, Hee Su, Geon-Woo Kim, Goon-Cherl Park, Hyoung Kyu Cho, and Ki-Hak Im. "Application of the mesh adaptation technique to effective heat capacity method for melting simulation of the first wall in breeding blanket under high heat flux condition." Fusion Engineering and Design 136 (November 2018): 891–96. http://dx.doi.org/10.1016/j.fusengdes.2018.04.030.

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25

Zhang, Yuan, Sunqi Zhuang, Qian Wang, and Jiapeng He. "Experimental Research on the Thermal Performance of Composite PCM Hollow Block Walls and Validation of Phase Transition Heat Transfer Models." Advances in Materials Science and Engineering 2016 (2016): 1–15. http://dx.doi.org/10.1155/2016/6359414.

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A type of concrete hollow block with typical structure and a common phase change material (PCM) were adopted. The PCM was filled into the hollow blocks by which the multiform composite PCM hollow blocks were made. The temperature-changing hot chamber method was used to test the thermal performance of block walls. The enthalpy method and the effective heat capacity method were used to calculate the heat transfer process. The results of the two methods can both reach the reasonable agreement with the experimental data. The unsteady-state thermal performance of the PCM hollow block walls is marke

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26

Kaga, Kunihiko, Kenichi Yamada, Satoru Kotoh, and Teturo Ogushi. "Prediction of the capacity of a heat exchanger by a thermal network method: Modified effective specific heat model considering the influence of static pressure distributions of refrigerants." Heat Transfer?Asian Research 31, no. 5 (2002): 376–90. http://dx.doi.org/10.1002/htj.10039.

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27

Guo, Hong Bin, Quan Zhou, Qing Hai Li, and Jia Peng He. "Analysis of Phase-Change Gypsum Board Used on the Wall of Hot Summer and Cold Winter Regions." Advanced Materials Research 598 (November 2012): 622–26. http://dx.doi.org/10.4028/www.scientific.net/amr.598.622.

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Use the effective heat capacity method model to simulate walls’ surface temperature such as peak value and volatility. Phase transition wall’s surface temperature is lower than the other’s(thermal mortar wall) in Nanjing. In addition, phase transition wall’s surface temperature volatility is smaller than thermal mortar wall’s. The mathematical model is verified by experiment. Phase transition wall improves the thermal comfort of room.

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28

Luyen, The-Thanh, Thi-Bich Mac, Tien-Long Banh, and Duc-Toan Nguyen. "A study on heating and determining the temperature generation on the sheet metal before the deep drawing process." International Journal of Modern Physics B 34, no. 22n24 (2020): 2040133. http://dx.doi.org/10.1142/s0217979220401335.

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Thermal-assisted machining (TAM) is an effective processing solution to improve productivity and product quality made from materials with high strength and hardness. This method is widely used in nonchip machining such as forging, stamping, deep drawing, etc. For the method of heating on the molds, it is possible to control local heat or uniform heat on the workpiece. However, the calculation of heat capacity, heat transfer as well as the heating time to achieve the temperature on the workpiece is necessary to design suitable molds and heating system. This study focuses on a heating system tha

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29

Klimes, Lubomir, Pavel Charvát, and Josef Stetina. "Mathematical Model of Multi-Layer Wall with Phase Change Material and its Use in Optimal Design." Advanced Materials Research 649 (January 2013): 295–98. http://dx.doi.org/10.4028/www.scientific.net/amr.649.295.

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The paper deals with the mathematical model of the multi-layer wall containing the phase change material (PCM). The model utilizes the effective heat capacity method for modeling the latent heat of phase change and the control volume method is used for the discretization of the model. The utilization of the model is then demonstrated on the problem of the optimal design of the multi-layer wall with the PCM. The TMY2 data for the city of Brno were used in simulations as operational conditions. The main attention is aimed at the determination of the optimal thickness of the PCM layer for the mul

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30

Chang, Keun Sun, Min Jun Kim, and Young Jae Kim. "An Experimental Study on the Thermal Performance Evaluation of SCW Ground Heat Exchanger." International Journal of Air-Conditioning and Refrigeration 25, no. 01 (2017): 1750006. http://dx.doi.org/10.1142/s2010132517500067.

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In recent years, application of the standing column well (SCW) ground heat exchanger (GHX) has been noticeably increased as a heat transfer mechanism of ground source heat pump (GSHP) systems with its high heat capacity and efficiency. Determination of the ground thermal properties is an important task for sizing and estimating cost of the GHX. In this study, an in situ thermal response test (TRT) is applied to the thermal performance evaluation of SCW. Two SCWs with different design configurations are installed in sequence to evaluate their effects on the thermal performance of SCW using a si

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31

Khalatov, A. A., G. V. Kovalenko, M. A. Mulyarchuk, and O. Yu Stepanyuk. "INFLUENCE MOISTURE FORMATION ON CYLINDER SURFACE ON THE DETERMINATION OF HEAT TRANSFER COEFFICIENT AIR DURING APPLICATION OF THE METHOD OF MELTING ICE." Thermophysics and Thermal Power Engineering 41, no. 1 (2018): 5–10. http://dx.doi.org/10.31472/ttpe.1.2019.1.

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Circular cylinders with cross-flow are a component of many technical devices in power engineering, heat engineering and chemical technology. For the intensification of external heat exchange, various types of ribs are widely used, the use of which is associated with a large metal capacity of the equipment. Application of holes on the heat exchange surface can significantly improve the thermohydraulic and mass-grossing characteristics of heat and mass equipment. A simple and effective way of intensifying heat transfer is the spiral groove on the outer surface of the pipe. The purpos

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32

McNider, Richard T., William M. Lapenta, Arastoo P. Biazar, Gary J. Jedlovec, Ronnie J. Suggs, and Jonathan Pleim. "Retrieval of Model Grid-Scale Heat Capacity Using Geostationary Satellite Products. Part I: First Case-Study Application." Journal of Applied Meteorology 44, no. 9 (2005): 1346–60. http://dx.doi.org/10.1175/jam2270.1.

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Abstract In weather forecast and general circulation models the behavior of the atmospheric boundary layer, especially the nocturnal boundary layer, can be critically dependent on the magnitude of the effective model grid-scale bulk heat capacity. Yet, this model parameter is uncertain both in its value and in its conceptual meaning for a model grid in heterogeneous conditions. Current methods for estimating the grid-scale heat capacity involve the areal/volume weighting of heat capacity (resistance) of various, often ill-defined, components. This can lead to errors in model performance in cer

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33

Sahu, Govind, VK Gaba, S. Panda, B. Acharya, and SP Mahapatra. "Thermal conductivity, thermal diffusivity, and volumetric heat capacity of silicone elastomer nanocomposites." High Performance Polymers 30, no. 3 (2017): 365–74. http://dx.doi.org/10.1177/0954008317698545.

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Silicone elastomer (SiR) nanocomposites were prepared using multiwalled carbon nanotubes (MWCNT) and nano-graphite (NG). The morphology of the SiR nanocomposites has been studied using scanning electron microscopy and high-resolution transmission electron microscopy techniques. Detailed analysis of the morphology reveals a uniform distribution of the MWCNT and NG filler particles in the silicone matrix. On increasing the filler loading, a continuous network structure is formed and aggregation takes place. The effect of the MWCNT and NG loadings on the thermal properties of the silicone elastom

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34

Agafonkina, Irina V., Igor A. Korolev, and Taras A. Sarantsev. "THE STUDY OF THERMAL DENATURATION OF BEEF, PORK, CHICKEN AND TURKEY MUSCLE PROTEINS USING DIFFERENTIAL SCANNING CALORIMETRY." Theory and practice of meat processing 4, no. 3 (2019): 19–23. http://dx.doi.org/10.21323/2414-438x-2019-4-3-19-23.

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In the temperature range from 45 °C to 90 °C the process of thermal denaturation of a whole complex of muscle proteins in meat takes place. An effective mode to register the thermal denaturation process is the method of differential scanning calorimetry (DSC). As a result of studies the differences during the process of thermal denaturation of muscle proteins of pork, beef, chicken and turkey were defined by the appearance of endothermic peaks in DSC thermograms. The main variances are associated with the process of denaturation of myosin and sacroplasmic proteins and indicate indirectly their

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35

Iten, Muriel, Shuli Liu, and Ashish Shukla. "Experimental validation of an air-PCM storage unit comparing the effective heat capacity and enthalpy methods through CFD simulations." Energy 155 (July 2018): 495–503. http://dx.doi.org/10.1016/j.energy.2018.04.128.

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36

Jindrová, Terézia. "EXPERIMENTAL METHOD OF JOULE’S EXPERIMENT IN PHYSICS FOR SECONDARY SCHOOL." CBU International Conference Proceedings 6 (September 27, 2018): 634–39. http://dx.doi.org/10.12955/cbup.v6.1225.

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Energy remains a problematic topic in the pedagogic sphere. One main issue in high-school teaching is the lack of practical examples. Such demonstrations are the most effective way of imparting knowledge. This article discusses a new modern version of the Joule’s experiment as a practical demonstration for Physics classes. It models the specific thermal capacity and the transformation of mechanical energy into heat energy. As such, it represents an approach for teaching thermodynamics. The goal of this research is to verify the functionality of the new apparatus and its optimization for use in

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37

Dranca, Ion. "Variation in Activation Energy and Nanoscale Characteristic Length at the Glass Transition." Chemistry Journal of Moldova 3, no. 1 (2008): 31–43. http://dx.doi.org/10.19261/cjm.2008.03(1).17.

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Differential scanning calorimetry has been used to study the α-relaxation (glass transition) in virgin polystyrene (PS), PS-clay nanocomposite, amorphous indomethacin (IM), maltitol (Mt) and glucose (Gl). Variation of the effective activation energy (E) throughout the glass transition has been determined by applying an advanced isoconversional method to DSC data on the glass transition. The relaxations have been characterized by determining the effective activation energies (E) and evaluating the sizes of cooperatively rearranging regions at the glass transition (Vg). The values of Vg have bee

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38

Lyu, Quan, Haoyan Gong, Nan Yang, Xiandong Xu, Na Zhang, and Haixia Wang. "An Evaluation Method of Wind Power Integration in Power Systems with Flexible Combined Heat and Power Plant." Energies 12, no. 21 (2019): 4129. http://dx.doi.org/10.3390/en12214129.

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During the heating period in Northeast China, the electricity generated by Combined Heat and Power (CHP) plants has caused a large amount of wind power curtailment. To avoid this curtailment, Heat Storages (HS) and Electric Boilers (EB) are being widely applied to CHP plants. However, the effectiveness of HS and EB on the curtailment of wind power has still not been well evaluated. This paper proposes a new evaluation method consisting of an operation boundary model and an internal coordinated operation model for each flexible CHP plant with HS and EB. Then a system power balance model based o

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Трушляков, Евгений Иванович, Николай Иванович Радченко та Вениамин Сергеевич Ткаченко. "ПОДХОД К АНАЛИЗУ ЭФФЕКТИВНОСТИ РЕГУЛИРОВАНИЯ ХОЛОДОПРОИЗВОДИТЕЛЬНОСТИ СИСТЕМ КОНДИЦИОНИРОВАНИЯ ПРИТОЧНОГО ВОЗДУХА". Aerospace technic and technology, № 6 (20 грудня 2018): 29–33. http://dx.doi.org/10.32620/aktt.2018.6.04.

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It is determined that the operation of ambient air conditioning systems (AACS) has significant fluctuations in the heat load in accordance with current climatic conditions. This makes very problematic the application of refrigeration compressors with frequency converters, which are very effective for controlling the refrigeration capacity in closed air conditioning systems, in which the temperature control range and, accordingly, fluctuations in thermal load are insignificant in comparison with the ambient air cooling. For the purpose of analyzing the efficiency of controlling the refrigeratio

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40

Luo, Win Jet, Kun Ying Li, Jeng Min Huang, and Chong Kai Yu. "Water Heating and Operational Mode Switching Effects on the Performance of a Multifunctional Heat Pump." Energies 13, no. 18 (2020): 4896. http://dx.doi.org/10.3390/en13184896.

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In this study, a multifunctional air and water source heat pump system was developed with a parallel refrigerant piping arrangement, which possessed six operational functions: space cooling (SC), space heating (SH), water heating (WH), water cooling (WC) and two composite operational modes. The two composite operational modes were the SC/WH mode and the SH/WH mode. The performance of the multifuctional heat pump system under different ambient conditions was investigated based on the testing standards of CNS 14464 and CNS 15466. In this study, the effect of the direct water heating (DWH) and ci

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41

Zhang, Lin, Zhi Lei Ma, Qing Xuan Bo, Li Kun Wang, and Li Li Gao. "Heat Transfer and Anti-Fouling of Liquid-Solid Two-Phase Flow in Cooling Water Pipes of Staves." Advanced Materials Research 383-390 (November 2011): 3035–39. http://dx.doi.org/10.4028/www.scientific.net/amr.383-390.3035.

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To solve the hard problem that the reduction of heat transfer efficiency on the cooling stave of blast furnace due to fouling deposition, solid particles have been added into the cooling water pipes, forming liquid-solid two-phase flow, which can change the heat transfer and anti-fouling capacities of the cooling water pipes. Under the different solid phase volume scores, the heat transfer and anti-fouling capacities of the liquid-solid two-phase flow in the cooling water pipes are studies. The results indicates that because of the perturbation and shearing effect of solid phase particles, not

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Seyed Salehi, Seyed Shahabaldin, Andrea Ferrantelli, Hans Kristjan Aljas, Jarek Kurnitski, and Martin Thalfeldt. "Impact of internal heat gain profiles on the design cooling capacity of landscaped offices." E3S Web of Conferences 246 (2021): 07003. http://dx.doi.org/10.1051/e3sconf/202124607003.

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Using passive methods in façade design for controlling heating and cooling needs is an important prerequisite for constructing cost-effective nearly zero-energy buildings. Optimal control of solar heat gains reduces the cooling demand and the size of the active cooling systems. However, applying such methods increases the impact of internal heat gains on the heat balance of the buildings, and accordingly also the dimensions of cooling systems. Therefore, a good model of internal heat gains is needed for a reliable and optimal sizing of the cooling sources. This paper aims to bring understandin

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Wu, Yangyang, Baichao Wang, Dong Li, and Changyu Liu. "Effect of timeliness on the thermal properties of paraffin-based Al2O3 nanofluids." Modern Physics Letters B 33, no. 05 (2019): 1950051. http://dx.doi.org/10.1142/s0217984919500519.

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Paraffin is an excellent photo-thermal conversion phase change energy storage material, and extensively used in the thermal storage field at the medium-low temperature. However, the low thermal conductivity of paraffin restricts its application in practice. Adding nanoparticles into paraffin is one of the effective methods to improve its thermal conductivity. Nevertheless, the thermal diffusivity, specific heat and volumetric heat capacity of paraffin as well as timeliness were affected after the addition of nanoparticles. In this paper, the influences of volume fraction of Al2O3 nanoparticle

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Fuentes-Sepúlveda, Rodrigo, Claudio García-Herrera, Diego A. Vasco, Carlos Salinas-Lira, and Rubén A. Ananías. "Thermal Characterization of Pinus radiata Wood Vacuum-Impregnated with Octadecane." Energies 13, no. 4 (2020): 942. http://dx.doi.org/10.3390/en13040942.

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The incorporation of phase change materials (PCM) in construction components has become an alternative to reduce the effect of thermal loads in buildings with low thermal inertia. This study put together the effective heat storage capacity of an organic phase change material (O-PCM, octadecane) with the construction and production potential of Pinus radiata in Chile. The wood is impregnated with octadecane by using the Bethell method, showing that it has good retention of the impregnator, and that its size was not modified. Differential scanning calorimetry analysis (DSC) showed that the compo

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Chudzik, Stanisław, and Waldemar Minkina. "An Idea of a Measurement System for Determining Thermal Parameters of Heat Insulation Materials." Metrology and Measurement Systems 18, no. 2 (2011): 261–74. http://dx.doi.org/10.2478/v10178-011-0008-2.

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An Idea of a Measurement System for Determining Thermal Parameters of Heat Insulation MaterialsThe article presents the prototype of a measurement system with a hot probe, designed for testing thermal parameters of heat insulation materials. The idea is to determine parameters of thermal insulation materials using a hot probe with an auxiliary thermometer and a trained artificial neural network. The network is trained on data extracted from a nonstationary two-dimensional model of heat conduction inside a sample of material with the hot probe and the auxiliary thermometer. The significant heat

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Xie, Yao Feng, and Wei Qing Tang. "Experimental Study on Evaluating High-Pile Wharfs for Real Ship Berthing Impact." Advanced Materials Research 671-674 (March 2013): 372–79. http://dx.doi.org/10.4028/www.scientific.net/amr.671-674.372.

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High-pile wharf is the most frequently used wharf structure form on soil foundation. However, few researches have been conducted to establish field overall evaluation methods capable of determining the berthing capacity of high-pile wharfs. Based on finite element numerical simulation, the stress-deformation relation, and the equations for loading-deflection relation at the pile head are obtained. The method to test the actual berthing capacity for real ship impact on high-pile wharf，as a direct and effective test method，and the security evaluation of high-pile wharf is put forward. These resu

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Akoshima, Megumi, Tetsuya Baba, Mitsue Ogawa, et al. "Thermal Diffusivity Measurements of the Layered Materials by the Laser Flash Method." Materials Science Forum 631-632 (October 2009): 103–8. http://dx.doi.org/10.4028/www.scientific.net/msf.631-632.103.

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Ceramics-based thermal barrier coatings are used as heat and wear shields of blades of gas turbine. There are strong needs to evaluate thermophysical properties of coatings, such as thermal conductivity, thermal diffusivity and heat capacity of them. Since coatings are attached on substrates, it is not easy to measure these properties separately. In order to evaluate the thermal diffusivity of coating attached on substrate, we have tried to apply the multi-layer model based on the response function method and established a procedure for the measurement by the laser flash method. We verified th

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Kuusisto, Sanna, Michael V. Holmes, Pauli Ohukainen, et al. "Direct Estimation of HDL-Mediated Cholesterol Efflux Capacity from Serum." Clinical Chemistry 65, no. 8 (2019): 1042–50. http://dx.doi.org/10.1373/clinchem.2018.299222.

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Abstract BACKGROUND HDL-mediated cholesterol efflux capacity (HDL-CEC) is a functional attribute that may have a protective role in atherogenesis. However, the estimation of HDL-CEC is based on in vitro cell assays that are laborious and hamper large-scale phenotyping. METHODS Here, we present a cost-effective high-throughput nuclear magnetic resonance (NMR) spectroscopy method to estimate HDL-CEC directly from serum. We applied the new method in a population-based study of 7603 individuals including 574 who developed incident coronary heart disease (CHD) during 15 years of follow-up, making t

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Vitelli, J. S., and B. A. Madigan. "Evaluation of a hand-held burner for the control of woody weeds by flaming." Australian Journal of Experimental Agriculture 44, no. 1 (2004): 75. http://dx.doi.org/10.1071/ea02096.

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A hand-held burner (Atarus Ranger) was evaluated as a method for controlling woody weeds by flaming in sensitive or riparian areas where traditional methods, such as chemical or mechanical control, have limited usefulness. The equipment was trialled on 3 North Queensland weed species: bellyache bush (Jatropha gossypiifolia), parkinsonia (Parkinsonia aculeata) and rubber vine (Cryptostegia grandiflora), at 5 different heat durations (0, 10, 30, 60 and 120 s) and on 3 plant size classes based on basal diameter (15–25, >25–50 and >50 mm).No significant difference in percentage mortality was

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Loginov, Sergey V., Anatoliy I. Masalevich, Sergey A. Meshkov, and Boris V. Mislavsky. "AN OVERVIEW OF THE METHODS AND EQUIPMENT FOR UTILIZATION OF CROP WASTE. IMPLEMENTATION OF LOW-TEMPERATURE PYROLYSIS AND GASIFICATION IN PILOT AND MOBILE INSTALLATIONS." Bulletin of the Saint Petersburg State Institute of Technology (Technical University) 55 (2020): 75–84. http://dx.doi.org/10.36807/1998-9849-2020-55-81-75-84.

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An analysis of existing methods and equipment for processing and recycling crop waste showed that the main efforts of experimental design and research work in this area are aimed at creating affordable, cheap, environmentally friendly, highly efficient and cost-effective installations for processing waste into products useful for the economy. The developed pilot plant was tested during thermal treatment of rice husks, coffee cake and other plant waste by the method of low-temperature pyrolysis or gasification in a screw reactor. The pilot plant provided the production of useful products of var

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